WO2011037269A1 - Shielded Connector - Google Patents

Shielded Connector Download PDF

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Publication number
WO2011037269A1
WO2011037269A1 PCT/JP2010/067015 JP2010067015W WO2011037269A1 WO 2011037269 A1 WO2011037269 A1 WO 2011037269A1 JP 2010067015 W JP2010067015 W JP 2010067015W WO 2011037269 A1 WO2011037269 A1 WO 2011037269A1
Authority
WO
WIPO (PCT)
Prior art keywords
shielded
wire
end portion
connector
cylindrical portion
Prior art date
Application number
PCT/JP2010/067015
Other languages
French (fr)
Inventor
Yuuhei Takeshita
Original Assignee
Yazaki Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corporation filed Critical Yazaki Corporation
Publication of WO2011037269A1 publication Critical patent/WO2011037269A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5205—Sealing means between cable and housing, e.g. grommet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure

Definitions

  • the present invention relates to a shielded connector and more particularly to an improvement in increasing waterproof property of a shielded connector.
  • a connector housing of a shielded connector includes a terminal accommodating portion for accommodating a connection terminal (a terminal) which connects to a mating connector and an electric wire end portion accommodating cylindrical portion for accommodating a range of a shielded wire whose core wire is electrically connected to the connection terminal which extends a predetermined length from an end portion of the connection terminal.
  • a shielded crimping space where a braided wire tube which is exposed by stripping a sheath of the shielded wire is disposed is formed in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion.
  • substantially cylindrical plug member (a seal member) is provided at an opening end side of the electric wire end portion accommodating cylindrical portion so as to fill a gap between the sheath (an insulation sheath) of the shielded wire and the electric wire end portion accommodating cylindrical portion.
  • the plug member attached to the opening end side of the electric wire end portion accommodating cylindrical portion separates the shielded crimping space from the opening end side of the electric wire end portion accommodating cylindrical portion so as to prevent drops of water from entering the interior of the shielded crimping space from the outside.
  • the intermed iate stop-water treatment described in PTL3 above involves additional working steps which are different fro m the normal connector components assembling steps and which involve many labor hours.
  • the additional working steps include a step of inserting a hot-melt tube into a predeterm ined position of the shielded wire with an exclusive jig and a step of heating to fuse the hot-melt tube which has been completely inserted so as to permeate through the braided wire tube uniform ly.
  • the invention has been made with a view to solving the problems described above, and an object thereof is to provide a shielded connector which can prevent the shielded connector itself or a mating connector from being stained by water that has penetrated into a shielded crimping space without calling for a reduction in productivity and increase in production costs.
  • a shielded connector comprising:
  • a shielded wire comprising a core wire which is made up of a covered electric wire, a braided wire tube which is made up of a metallic wire which covers the core wire and a sheath which is made up of an insulation resin which covers the braided wire tube;
  • connection terminal having a center wire connecting portion which is electrically connected to a center wire of the core wire and a connector connecting portion which is electrically connected to a connection terminal of a mating connector;
  • a connector housing comprising a terminal accommodating portion for accommodating the connection terminal which is electrically connected to the core wire, an electric wire end portion accommodating cylindrical portion for accommodating a range of the shielded wire connected to the connection terminal which extends a predetermined length from the center wire connecting portion and a shielded crimping space which is provided in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion and in which the braided wire tube is disposed which is exposed by stripping part of the sheath of the shielded wire; and
  • the shielded connector further comprising:
  • a cylindrical sealing packing which is formed of an elastic material having waterproof property into a cylindrical shape and which is closely fitted on the sheath of the shielded wire so that the sealing packing is closely fitted in an inner circumference of the plug member at one end side and projects into an interior of the shielded crimping space at the other end side;
  • a primary sealing cap which is formed of an elastic material having waterproof property into a substantially cylindrical portion and which is closely fitted on an outer circumference of the plug member at one end side and is closely fitted on an outer circumference of the other end portion of the sealing packing at the other end side thereof.
  • the secondary sealing cap comprises a cylindrical portion which is closely fitted on the end portion of the plug member via the primary sealing cap and which covers an outer circumference of the shielded crimping space and a inner diameter flange portion which extends radially inwards from an end portion of the cylindrical portion so as to closely fit on an outer circumference of the core wire and defines the shielded crimping space into a closed space.
  • the end portion of the plug member which is positioned at a shielded crimping space side within the electric wire end portion accommodating cylindrical portion is accommodated within the sealed space which is defined by the sealing packing and the primary sealing cap.
  • the sealing packing, the plug member and the primary sealing cap which are used to prevent the penetration of water into the shielded crimping space can be fittingly attached to the end portion of the shielded wire before the connection terminal is connected to the shielded wire, for example, whereby those stop-water components can easily be attached to the shielded wire without using an exclusive jig or the like. Consequently, compared with the conventional stop-water treatment which utilizes hot melt, the working step such as the heating and fusing step involving many labor hours can be made unnecessary. In other words, in fabrication of the shielded connector, it is possible to prevent the penetration of water into the shielded crimping space within the shielded connector from the outside without involving the step which takes many labor hours.
  • the shielded crimping space is defined further into the closed space by the secondary sealing cap, whereby water within the shielded crimping space is prevented from flowing out towards the electrical connecting portion between the core wire and the connection terminal and the terminal accommodating portion. Consequently, the performance can be increased further of preventing the shielded connector itself or the mating connector from being stained as a result of water penetration into the shielded crimping space.
  • the shielded connector of the invention water penetration into the shielded crimping space within the shielded connector from the outside can be prevented without involving the additional working steps which take many labor hours at the time of fabricating the shielded connector, whereby the shielded connector or the mating connector can be prevented from being stained as a result of water penetration into the shielded crimping space without calling for a reduction in productivity and an increase in production costs.
  • Fig. 1 is an exploded perspective view of a shielded connector according to a first embodiment of the invention.
  • Fig. 2 is a partially cutaway perspective view showing a state in which the shielded connector shown in Fig. 1 is fabricated.
  • Fig. 3 is an enlarged view of a portion of a connector housing shown in Fig. 2 which lies in proximity to an opening end of an electric wire end portion accommodating cylindrical portion. Description of Embodiments
  • FIGS. 1 to 3 show an embodiment of a shielded connector according to the invention, of which Fig. 1 is an exploded perspective view of the shielded connector, Fig. 2 is a partially cutaway perspective view showing a state in which the shielded connector is fabricated, and Fig. 3 is an enlarged view of a portion of a connector housing shown in Fig.2 which lies in proximity to an opening end of an electric wire end portion accommodating cylindrical portion.
  • a shielded connector 1 of this embodiment includes a shielded wire 3, a connection terminal (a terminal) 5, a connector housing 7, and a stop-water structure 9 which is attached to an insertion portion in the connector housing 7 into which the shielded wire 3 is inserted.
  • the shielded wire 3 includes, as is shown in Fig. 3, a core wire 11 which is a covered electric wire in which a center wire 11a, which is a conductor, is covered with an insulation covering 11b, a braided wire tube 13 which covers the core wire 11 and which is made up of a metallic wire, and a sheath 1 5 which covers the braided wire tube 13 and which is formed of an insulation resin.
  • the connection terminal 5 is a pressed product which is pressed out of sheet metal and has, as is shown in Fig. 1 , a center wire connecting portion 17 which is electrically connected to the center wire 11 a of the core wire 11 and a connector connecting portion 18 which is electrically connected to a connection terminal of a mating connector.
  • the center wire connecting portion 17 is electrically connected to the center wire 11 a through a crimping connection in which a crimping piece 17a is crimped on to the center wire 11 a.
  • the connector housing 7 includes a housing main body 21 into which the shielded wire 3 to which the connection terminal 5 is crimped is assembled from one side, an electric wire fixing device 23 which fixes the shielded wire 3 which is assembled into the housing main body 21 , a cover 25 which covers the shielded wire 3 which is assembled into the housing main body 21 and the electric wire fixing device 23 from thereabove, an end portion cover 27 which is fastened to a lower end side of the cover 25 to constitute part of an electric wire end portion accommodating cylindrical portion, which will be described later, and a sealing ring 29 which is assembled into the housing main body 21 .
  • the end portion cover 27 is fastened to the cover 25 with a pair of bolts 30.
  • the end portion cover 27 constitutes part of the electric wire end portion cylindrical portion 33, which will be described later, in cooperation with the cover 25.
  • the stop-water structure 9 which is attached to each shielded wire 3 is assembled into part of the electric wire end portion accommodating cylindrical portion 33 which is made up of the end portion cover 27 and the cover 25.
  • the connector housing 7 accommodates, as is shown in Fig. 1 , two connection terminals 5 to each of which a shielded wire 3 is crimped for connection.
  • the connector housing 7 includes a terminal accommodating portion 31 which accommodates the connection terminals 5 which are electrically connected to the core wire 11 and the electric wire end portion accommodating cylindrical portion 33 which accommodates a range of the shielded wire 3 connected to the connection terminal 5 which extends a predetermined length from the center wire connecting portion 17.
  • the terminal accommodating portion 31 is formed so as to leave a gap 34 between the center wire connecting portion 17 and itself.
  • a filling agent is injected into the gap 34 so as not only to fix the center wire connecting portion 17 but also to stop water lying around a perimeter of the center wire connecting portion 17.
  • a shielded crimping space 35 is defined to be formed in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion 33 by the stop-water structure 9, which will be described later.
  • the braided wire tube 1 3 which is exposed by stripping part of the sheath 15 of the shielded wire 3 is disposed in the shielded crimping space 35.
  • the electric wire end portion accommodating cylindrical portion 33 includes a core wire accommodating portion 41 having a small sectional area and a stop-water structure accommodating portion 43 having a large sectional area.
  • the core wire accommodating portion 41 accommodates part of the core wire 11 which is exposed by stripping a corresponding part of the sheath 15 and a corresponding part of the braided wire tube 13.
  • the stop-water structure accommodating portion 43 is positioned at the opening end side of the electric wire ehd portion accommodating cylindrical portion 33 and accommodates the stop-water structure 9 which is attached to the shielded wire 3.
  • the stop-water structure 9 includes a plug member (a shielded terminal) 51 , a sealing packing 53, a primary sealing cap 55 and a secondary sealing cap 57.
  • the plug member 51 is fittingly attached to an opening end side of the stop-water structure accommodating portion 43, which constitutes part of the electric wire end portion accommodating cylindrical portion 33.
  • This plug member 51 is formed of an elastic material having waterproof property into a substantially cylindrical portion.
  • the plug member 51 includes a large-diameter cylindrical portion 61 whose outer circumference fits in the stop-water structure accommodating portion 43 and small-diameter cylindrical portions 63, 63 whose outside diameter is set smaller than that of the large-diameter cylindrical portion 61 and which are provided continuously at both ends of the larger-diameter cylindrical portion 61 .
  • An electric wire insertion hole 65 is formed so as to pass through the large-diameter cylindrical portion 61 and the small-diameter cylindrical portions 65, and the electric wire insertion hole 65 fits on the outer circumference of the shielded wire 3.
  • a plurality of sealing elongated projections 67 are provided circumferentially on an inner circumference of the large-diameter cylindrical portion 61 so as to be closely attached to the outer circumference of the shielded wire 3.
  • a plurality of sealing elongated projections 68 are provided circumferentially on an outer circumference of the large-diameter cylindrical portion 61 so as to be closely attached to an inner circumferential surface of the stop-water structure accommodating portion 43.
  • the plug member 51 which has been described above, is fittingly attached to an outer circumference of the sheath 15 of the shielded wire 3 so as to fill a gap between the sheath 15 and the stop-water structure accommodating portion 43 to thereby separate (cut off) the shielded crimping space 35 from the opening end side of the stop-water structure accommodating portion 43.
  • the sealing packing 53 is formed of an elastic material having waterproof property into a simple cylindrical shape.
  • An inside diameter of the sealing packing 53 is set so as to closely fit on the outer circumference of the sheath 15 of the shielded wire 3.
  • an outside diameter of the sealing packing 53 is set so as to closely fit in an inner circumference of the small-diameter cylindrical portion 63 which constitutes an end portion of the plug member 51 within the stop-water structure accommodating portion 43.
  • the sealing packing 53 which has been described above, is closely fitted on the sheath 15 of the shielded wire 3 so that the sealing packing 53 closely fits in the inner circumference of the plug member 51 at one end side and projects into the shielded crimping space 35 at the other end side.
  • the primary sealing cap 55 is formed of an elastic material having waterproof property into a substantially cylindrical shape. As is shown in Fig. 3, the primary sealing cap 55 has a large-diameter plug fitting cylindrical portion 71 which is formed at one end side thereof so as to closely fit on the outer circumference of the plug member 51 . In addition, the primary sealing cap 55 has a stacked fitting cylindrical portion 73 which is formed at the other end side thereof so as to closely fit on an outer circumference of the other end portion of the sealing packing 53 in a stacked fashion.
  • the primary sealing cap 55 which has been described above, not only closely fits on the outer circumference of the plug member 51 at the one end side but also closely fits on the outer circumference of the other end portion of the sealing packing 53 at the other end side to thereby seal the end portion of the plug member 51 within the stop-water structure accommodating portion 43 so as to cut off a communication between the inner circumference and the outer circumference of the end portion of the plug member 51 .
  • the secondary sealing cap 57 fits on the end portion (the small-diameter cylindrical portion 63) of the plug member 51 within the electric wire end portion accommodating cylindrical portion 33 so as to be integrated with the plug member 51 .
  • the secondary sealing cap 57 includes a cylindrical portion 81 which closely fits on the small-diameter cylindrical portion 63, which constitutes the end portion of the plug member 51 , via the primary sealing cap 55 and an inner diameter flange portion 83 which extends radially inwards from an end portion of the cylindrical portion 81 which lies opposite to the plug member 51 so as to closely fit on the outer circumference of the core wire 11 .
  • Sealing elongated projections 84 are provided circumferentially on an inner circumferential portion of the inner diameter flange portion 83 so as to enhance the sealing performance between the inner diameter flange portion 83 and the core wire 11 .
  • the cylindrical portion 81 of the secondary sealing cap 57 also functions as a bulkhead which covers an outer perimeter of the shielded crimping space 35.
  • the secondary sealing cap 57 defines to form the shielded crimping space 35, which is a closed space, between the plug member 51 and itself by being integrated with the plug member 51 .
  • the small-diameter cylindrical portion 63 which constitutes the end portion of the plug member 51 which is positioned at a shielded crimping space 35 side within the electric wire end portion accommodating cylindrical portion 33 is accommodated within a sealed space 91 (refer to Fig. 3) which is defined by the sealing packing 53 and the primary sealing cap 55.
  • the sealing packing 53, the plug member 51 and the primary sealing cap 55 which are used to prevent the penetration of water into the shielded crimping space 35 can be fittingly attached to the end portion of the shielded wire 3 before the connection terminal 5 is connected to the shielded wire 3, for example, whereby those stop-water components can easily be attached to the shielded wire 3 without using an exclusive jig or the like. Consequently, compared with the conventional stop-water treatment which utilizes hot melt, the working step such as the heating and fusing step involving many labor hours can be made unnecessary. In other words, in fabrication of the shielded connector 1 , it is possible to prevent the penetration of water into the shielded crimping space 35 within the shielded connector 1 from the outside without involving the step which takes many labor hours.
  • the shielded crimping space 35 is defined further into the closed space by the secondary sealing cap 57, whereby water within the shielded crimping space 35 is prevented from flowing out towards the electrical connecting portion between the core wire 3 and the connection terminal 5 and the terminal accommodating portion 31 . Consequently, the performance can be increased further of preventing the shielded connector 1 itself or the mating connector from being stained as a result of water penetration into the shielded crimping space 35.
  • the inner diameter flange portion 83 of the secondary sealing cap 57 functions as a stop-water wall which cuts off the communication between the core wire accommodating portion 41 and the stop-water structure accommodating portion 43 of the electric wire end portion accommodating cylindrical portion 33. Because of this, as is indicated by an arrow B in Fig. 3, should there be water attempting to enter from a core wire accommodating portion 41 side, it is also possible to prevent the penetration of the water into the interior of the shielded crimping space 35.
  • the invention is not limited to the embodiment that has been described heretofore and hence can be modified or improved as required.
  • the materials, shapes, dimensions, numeric values, forms, numbers, places where to be disposed of the respective constituent elements are arbitrary and hence are not limited to those described in the embodiment, as long as the invention can be attained.

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  • Connector Housings Or Holding Contact Members (AREA)

Abstract

To provide a shielded connector which can prevent the shielded connector itself or a mating connector from being stained by water that has penetrated into a shielded crimping space without calling for a reduction in productivity and increase in production costs. An end portion of a plug member 51 which is attached to an opening end side of an electric wire end portion accommodating cylindrical portion 33 of a connector housing 7 into which a shielded wire 3 is inserted is sealed by a cylindrical sealing packing 53 which fits in an inner circumference of the plug member 51 at one end side and projects into an interior of a shielded crimping space 35 which is formed in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion 33 at the other end side thereof and a primary sealing cap 55 which fits on an outer circumference of the plug member 51 at one end side and fits on an outer circumference of the other end portion of the sealing packing 53 at the other end side.

Description

DESCRIPTION
Shielded Connector Technical Field
The present invention relates to a shielded connector and more particularly to an improvement in increasing waterproof property of a shielded connector. Background Art
A connector housing of a shielded connector includes a terminal accommodating portion for accommodating a connection terminal (a terminal) which connects to a mating connector and an electric wire end portion accommodating cylindrical portion for accommodating a range of a shielded wire whose core wire is electrically connected to the connection terminal which extends a predetermined length from an end portion of the connection terminal. Normally, a shielded crimping space where a braided wire tube which is exposed by stripping a sheath of the shielded wire is disposed is formed in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion.
In general, as is disclosed in PTL 1 , 2 below, with a view to preventing the penetration of drops of water from an opening end of the electric wire end portion accommodating cylindrical portion, a
l substantially cylindrical plug member (a seal member) is provided at an opening end side of the electric wire end portion accommodating cylindrical portion so as to fill a gap between the sheath (an insulation sheath) of the shielded wire and the electric wire end portion accommodating cylindrical portion.
The plug member attached to the opening end side of the electric wire end portion accommodating cylindrical portion separates the shielded crimping space from the opening end side of the electric wire end portion accommodating cylindrical portion so as to prevent drops of water from entering the interior of the shielded crimping space from the outside.
However, even though the opening end side of the electric wire end portion accommodating cylindrical portion is sealed by the plug member, in the event that an external cut or the like exists in part of the sheath of the shielded wire which extends from the connector housing to the outside thereof, there has been a fear that water which permeates into the braided wire tube from the external cut penetrates into the shielded crimping space through or along the braided wire tube, which triggers a further fear that the inside of the shielded connector itself or the mating connector is stained by the water that has so penetrated into the shielded crimping space. Then, with a view to preventing water that has penetrated into the sh ielded cri m ping space through or along the braided wire tube from penetrating into the inside of the shielded connector or the mating connector, there has been proposed a tech n ique for i mplementing an intermediate stop-water treatment in which a braided wire tube is i mpregnated with a hot melt so as to cut off the penetration of water (refer to PTL3 below).
Citation List
Patent Literature
PTL 1 : J P-A-2002-260773
PTL 2: J P-A-7-22081 3
PTL 3: J P-A-2009-021 1 46
Sum mary of I nvention
Technical P roblem
However, the intermed iate stop-water treatment described in PTL3 above involves additional working steps which are different fro m the normal connector components assembling steps and which involve many labor hours. The additional working steps include a step of inserting a hot-melt tube into a predeterm ined position of the shielded wire with an exclusive jig and a step of heating to fuse the hot-melt tube which has been completely inserted so as to permeate through the braided wire tube uniform ly. Thus, additional problems have been caused that the productivity of sh ielded connectors is reduced and that the production costs are increased. Then, the invention has been made with a view to solving the problems described above, and an object thereof is to provide a shielded connector which can prevent the shielded connector itself or a mating connector from being stained by water that has penetrated into a shielded crimping space without calling for a reduction in productivity and increase in production costs.
Solution to Problem
The object described above will be attained by the following configurations.
(1 ) According to a first aspect of the invention, there is provided a shielded connector comprising:
a shielded wire comprising a core wire which is made up of a covered electric wire, a braided wire tube which is made up of a metallic wire which covers the core wire and a sheath which is made up of an insulation resin which covers the braided wire tube;
a connection terminal having a center wire connecting portion which is electrically connected to a center wire of the core wire and a connector connecting portion which is electrically connected to a connection terminal of a mating connector;
a connector housing comprising a terminal accommodating portion for accommodating the connection terminal which is electrically connected to the core wire, an electric wire end portion accommodating cylindrical portion for accommodating a range of the shielded wire connected to the connection terminal which extends a predetermined length from the center wire connecting portion and a shielded crimping space which is provided in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion and in which the braided wire tube is disposed which is exposed by stripping part of the sheath of the shielded wire; and
a substantially cylindrical plug member which is fittingly attached to an outer circumference of the sheath of the shielded wire at an opening end side of the electric wire end portion accommodating cylindrical portion so as to fill a gap between the sheath and the electric wire end portion accommodating cylindrical portion to thereby separate the shielded crimping space from the opening end side of the electric wire end portion accommodating cylindrical portion, the shielded connector further comprising:
a cylindrical sealing packing which is formed of an elastic material having waterproof property into a cylindrical shape and which is closely fitted on the sheath of the shielded wire so that the sealing packing is closely fitted in an inner circumference of the plug member at one end side and projects into an interior of the shielded crimping space at the other end side; and
a primary sealing cap which is formed of an elastic material having waterproof property into a substantially cylindrical portion and which is closely fitted on an outer circumference of the plug member at one end side and is closely fitted on an outer circumference of the other end portion of the sealing packing at the other end side thereof. (2) According to a second aspect of the invention, there is provided a shielded connector as set forth under ( 1 ) above, further comprising a secondary sealing cap which is fitted on an end portion of the plug member within the electric wire end portion accommodating cylindrical portion, wherein
the secondary sealing cap comprises a cylindrical portion which is closely fitted on the end portion of the plug member via the primary sealing cap and which covers an outer circumference of the shielded crimping space and a inner diameter flange portion which extends radially inwards from an end portion of the cylindrical portion so as to closely fit on an outer circumference of the core wire and defines the shielded crimping space into a closed space.
According to the configuration described under (1 ) above, the end portion of the plug member which is positioned at a shielded crimping space side within the electric wire end portion accommodating cylindrical portion is accommodated within the sealed space which is defined by the sealing packing and the primary sealing cap.
Because of this, even though there is water attempting to flow into the shielded crimping space from the opening end side of the electric wire end portion accommodating cylindrical portion through or along the inner circumference or the outer circumference of the plug member, water which manages to flow thereinto is kept isolated within the sealed space and cannot reach the shielded crimping space. Consequently, it is possible to prevent the penetration of water into the shielded crimping space within the shielded connector from the outside.
In addition, the sealing packing, the plug member and the primary sealing cap which are used to prevent the penetration of water into the shielded crimping space can be fittingly attached to the end portion of the shielded wire before the connection terminal is connected to the shielded wire, for example, whereby those stop-water components can easily be attached to the shielded wire without using an exclusive jig or the like. Consequently, compared with the conventional stop-water treatment which utilizes hot melt, the working step such as the heating and fusing step involving many labor hours can be made unnecessary. In other words, in fabrication of the shielded connector, it is possible to prevent the penetration of water into the shielded crimping space within the shielded connector from the outside without involving the step which takes many labor hours. Consequently, it is possible to prevent the shielded connector itself or the mating connector from being stained as a result of water penetration into the shielded crimping space without calling for a reduction in productivity and an increase in production costs. According to the configuration described under (2) above, should a penetration of water into the shielded crimping space occur, the shielded crimping space is defined further into the closed space by the secondary sealing cap, whereby water within the shielded crimping space is prevented from flowing out towards the electrical connecting portion between the core wire and the connection terminal and the terminal accommodating portion. Consequently, the performance can be increased further of preventing the shielded connector itself or the mating connector from being stained as a result of water penetration into the shielded crimping space.
Advantageous Effects of Invention
According to the shielded connector of the invention, water penetration into the shielded crimping space within the shielded connector from the outside can be prevented without involving the additional working steps which take many labor hours at the time of fabricating the shielded connector, whereby the shielded connector or the mating connector can be prevented from being stained as a result of water penetration into the shielded crimping space without calling for a reduction in productivity and an increase in production costs.
Brief Description of Drawings
Fig. 1 is an exploded perspective view of a shielded connector according to a first embodiment of the invention.
Fig. 2 is a partially cutaway perspective view showing a state in which the shielded connector shown in Fig. 1 is fabricated. Fig. 3 is an enlarged view of a portion of a connector housing shown in Fig. 2 which lies in proximity to an opening end of an electric wire end portion accommodating cylindrical portion. Description of Embodiments
Hereinafter, a preferred embodiment of a shielded connector according to the invention will be described in detail by reference to the drawings. Figs. 1 to 3 show an embodiment of a shielded connector according to the invention, of which Fig. 1 is an exploded perspective view of the shielded connector, Fig. 2 is a partially cutaway perspective view showing a state in which the shielded connector is fabricated, and Fig. 3 is an enlarged view of a portion of a connector housing shown in Fig.2 which lies in proximity to an opening end of an electric wire end portion accommodating cylindrical portion.
A shielded connector 1 of this embodiment includes a shielded wire 3, a connection terminal (a terminal) 5, a connector housing 7, and a stop-water structure 9 which is attached to an insertion portion in the connector housing 7 into which the shielded wire 3 is inserted.
The shielded wire 3 includes, as is shown in Fig. 3, a core wire 11 which is a covered electric wire in which a center wire 11a, which is a conductor, is covered with an insulation covering 11b, a braided wire tube 13 which covers the core wire 11 and which is made up of a metallic wire, and a sheath 1 5 which covers the braided wire tube 13 and which is formed of an insulation resin. The connection terminal 5 is a pressed product which is pressed out of sheet metal and has, as is shown in Fig. 1 , a center wire connecting portion 17 which is electrically connected to the center wire 11 a of the core wire 11 and a connector connecting portion 18 which is electrically connected to a connection terminal of a mating connector. The center wire connecting portion 17 is electrically connected to the center wire 11 a through a crimping connection in which a crimping piece 17a is crimped on to the center wire 11 a.
The connector housing 7 includes a housing main body 21 into which the shielded wire 3 to which the connection terminal 5 is crimped is assembled from one side, an electric wire fixing device 23 which fixes the shielded wire 3 which is assembled into the housing main body 21 , a cover 25 which covers the shielded wire 3 which is assembled into the housing main body 21 and the electric wire fixing device 23 from thereabove, an end portion cover 27 which is fastened to a lower end side of the cover 25 to constitute part of an electric wire end portion accommodating cylindrical portion, which will be described later, and a sealing ring 29 which is assembled into the housing main body 21 . The end portion cover 27 is fastened to the cover 25 with a pair of bolts 30. The end portion cover 27 constitutes part of the electric wire end portion cylindrical portion 33, which will be described later, in cooperation with the cover 25. The stop-water structure 9 which is attached to each shielded wire 3 is assembled into part of the electric wire end portion accommodating cylindrical portion 33 which is made up of the end portion cover 27 and the cover 25.
As is shown in Fig. 2, the connector housing 7 accommodates, as is shown in Fig. 1 , two connection terminals 5 to each of which a shielded wire 3 is crimped for connection.
As is shown in Fig. 2, the connector housing 7 includes a terminal accommodating portion 31 which accommodates the connection terminals 5 which are electrically connected to the core wire 11 and the electric wire end portion accommodating cylindrical portion 33 which accommodates a range of the shielded wire 3 connected to the connection terminal 5 which extends a predetermined length from the center wire connecting portion 17.
As is shown in Fig. 2, the terminal accommodating portion 31 is formed so as to leave a gap 34 between the center wire connecting portion 17 and itself. A filling agent is injected into the gap 34 so as not only to fix the center wire connecting portion 17 but also to stop water lying around a perimeter of the center wire connecting portion 17.
A shielded crimping space 35 is defined to be formed in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion 33 by the stop-water structure 9, which will be described later.
The braided wire tube 1 3 which is exposed by stripping part of the sheath 15 of the shielded wire 3 is disposed in the shielded crimping space 35.
As is shown in Figs. 2 and 3, the electric wire end portion accommodating cylindrical portion 33 includes a core wire accommodating portion 41 having a small sectional area and a stop-water structure accommodating portion 43 having a large sectional area.
The core wire accommodating portion 41 accommodates part of the core wire 11 which is exposed by stripping a corresponding part of the sheath 15 and a corresponding part of the braided wire tube 13.
The stop-water structure accommodating portion 43 is positioned at the opening end side of the electric wire ehd portion accommodating cylindrical portion 33 and accommodates the stop-water structure 9 which is attached to the shielded wire 3. As is shown in Fig. 3, the stop-water structure 9 includes a plug member (a shielded terminal) 51 , a sealing packing 53, a primary sealing cap 55 and a secondary sealing cap 57.
The plug member 51 is fittingly attached to an opening end side of the stop-water structure accommodating portion 43, which constitutes part of the electric wire end portion accommodating cylindrical portion 33. This plug member 51 is formed of an elastic material having waterproof property into a substantially cylindrical portion. The plug member 51 includes a large-diameter cylindrical portion 61 whose outer circumference fits in the stop-water structure accommodating portion 43 and small-diameter cylindrical portions 63, 63 whose outside diameter is set smaller than that of the large-diameter cylindrical portion 61 and which are provided continuously at both ends of the larger-diameter cylindrical portion 61 .
An electric wire insertion hole 65 is formed so as to pass through the large-diameter cylindrical portion 61 and the small-diameter cylindrical portions 65, and the electric wire insertion hole 65 fits on the outer circumference of the shielded wire 3.
In addition, a plurality of sealing elongated projections 67 are provided circumferentially on an inner circumference of the large-diameter cylindrical portion 61 so as to be closely attached to the outer circumference of the shielded wire 3. Further, a plurality of sealing elongated projections 68 are provided circumferentially on an outer circumference of the large-diameter cylindrical portion 61 so as to be closely attached to an inner circumferential surface of the stop-water structure accommodating portion 43. The plug member 51 , which has been described above, is fittingly attached to an outer circumference of the sheath 15 of the shielded wire 3 so as to fill a gap between the sheath 15 and the stop-water structure accommodating portion 43 to thereby separate (cut off) the shielded crimping space 35 from the opening end side of the stop-water structure accommodating portion 43.
The sealing packing 53 is formed of an elastic material having waterproof property into a simple cylindrical shape. An inside diameter of the sealing packing 53 is set so as to closely fit on the outer circumference of the sheath 15 of the shielded wire 3. In addition, an outside diameter of the sealing packing 53 is set so as to closely fit in an inner circumference of the small-diameter cylindrical portion 63 which constitutes an end portion of the plug member 51 within the stop-water structure accommodating portion 43.
The sealing packing 53, which has been described above, is closely fitted on the sheath 15 of the shielded wire 3 so that the sealing packing 53 closely fits in the inner circumference of the plug member 51 at one end side and projects into the shielded crimping space 35 at the other end side. The primary sealing cap 55 is formed of an elastic material having waterproof property into a substantially cylindrical shape. As is shown in Fig. 3, the primary sealing cap 55 has a large-diameter plug fitting cylindrical portion 71 which is formed at one end side thereof so as to closely fit on the outer circumference of the plug member 51 . In addition, the primary sealing cap 55 has a stacked fitting cylindrical portion 73 which is formed at the other end side thereof so as to closely fit on an outer circumference of the other end portion of the sealing packing 53 in a stacked fashion.
The primary sealing cap 55, which has been described above, not only closely fits on the outer circumference of the plug member 51 at the one end side but also closely fits on the outer circumference of the other end portion of the sealing packing 53 at the other end side to thereby seal the end portion of the plug member 51 within the stop-water structure accommodating portion 43 so as to cut off a communication between the inner circumference and the outer circumference of the end portion of the plug member 51 .
The secondary sealing cap 57 fits on the end portion (the small-diameter cylindrical portion 63) of the plug member 51 within the electric wire end portion accommodating cylindrical portion 33 so as to be integrated with the plug member 51 .
As is shown in Fig. 3, the secondary sealing cap 57 includes a cylindrical portion 81 which closely fits on the small-diameter cylindrical portion 63, which constitutes the end portion of the plug member 51 , via the primary sealing cap 55 and an inner diameter flange portion 83 which extends radially inwards from an end portion of the cylindrical portion 81 which lies opposite to the plug member 51 so as to closely fit on the outer circumference of the core wire 11 . Sealing elongated projections 84 are provided circumferentially on an inner circumferential portion of the inner diameter flange portion 83 so as to enhance the sealing performance between the inner diameter flange portion 83 and the core wire 11 .
The cylindrical portion 81 of the secondary sealing cap 57 also functions as a bulkhead which covers an outer perimeter of the shielded crimping space 35.
In other words, the secondary sealing cap 57 defines to form the shielded crimping space 35, which is a closed space, between the plug member 51 and itself by being integrated with the plug member 51 .
In the shielded connector 1 that has been described heretofore, the small-diameter cylindrical portion 63 which constitutes the end portion of the plug member 51 which is positioned at a shielded crimping space 35 side within the electric wire end portion accommodating cylindrical portion 33 is accommodated within a sealed space 91 (refer to Fig. 3) which is defined by the sealing packing 53 and the primary sealing cap 55.
Because of this, as is indicated by arrows A in Fig. 3, even though there is water attempting to flow into the shielded crimping space 35 from the opening end side of the electric wire end portion accommodating cylindrical portion 33 through or along the inner circumference or the outer circumference of the plug member 51 , water which manages to flow thereinto is kept isolated within the sealed space 91 and cannot reach the shielded crimping space 35. Consequently, it is possible to prevent the penetration of water into the shielded crimping space 35 within the shielded connector 1 from the outside. In addition, the sealing packing 53, the plug member 51 and the primary sealing cap 55 which are used to prevent the penetration of water into the shielded crimping space 35 can be fittingly attached to the end portion of the shielded wire 3 before the connection terminal 5 is connected to the shielded wire 3, for example, whereby those stop-water components can easily be attached to the shielded wire 3 without using an exclusive jig or the like. Consequently, compared with the conventional stop-water treatment which utilizes hot melt, the working step such as the heating and fusing step involving many labor hours can be made unnecessary. In other words, in fabrication of the shielded connector 1 , it is possible to prevent the penetration of water into the shielded crimping space 35 within the shielded connector 1 from the outside without involving the step which takes many labor hours.
Consequently, it is possible to prevent the shielded connector 1 itself or the mating connector from being stained as a result of water penetration into the shielded crimping space 35 without calling for a reduction in productivity and an increase in production costs.
In addition, in the shielded connector 1 of the embodiment, should a penetration of water into the shielded crimping space 35 occur, the shielded crimping space 35 is defined further into the closed space by the secondary sealing cap 57, whereby water within the shielded crimping space 35 is prevented from flowing out towards the electrical connecting portion between the core wire 3 and the connection terminal 5 and the terminal accommodating portion 31 . Consequently, the performance can be increased further of preventing the shielded connector 1 itself or the mating connector from being stained as a result of water penetration into the shielded crimping space 35.
Additionally, in the shielded connector 1 of the embodiment, the inner diameter flange portion 83 of the secondary sealing cap 57 functions as a stop-water wall which cuts off the communication between the core wire accommodating portion 41 and the stop-water structure accommodating portion 43 of the electric wire end portion accommodating cylindrical portion 33. Because of this, as is indicated by an arrow B in Fig. 3, should there be water attempting to enter from a core wire accommodating portion 41 side, it is also possible to prevent the penetration of the water into the interior of the shielded crimping space 35. The invention is not limited to the embodiment that has been described heretofore and hence can be modified or improved as required. In addition, the materials, shapes, dimensions, numeric values, forms, numbers, places where to be disposed of the respective constituent elements are arbitrary and hence are not limited to those described in the embodiment, as long as the invention can be attained.
This application is based upon and claims the benefit of priority of Japanese Patent Application No.2009-219569 filed on September 24, 2009, the contents of which are incorporated herein by reference.
References Signs List
1 shielded connector; 3 shielded wire; 5 connection terminal; 7 connector housing; 9 stop-water structure; 11 core wire; 13 braided wire tube; 15 sheath; 21 housing main body; 25 cover; 31 terminal accommodating portion; 33 electric wire end portion accommodating cylindrical portion; 35 shielded crimping space; 41 core wire accommodating portion; 43 stop-water structure accommodating portion; 51 plug member (shielded terminal); 53 sealing packing; 55 primary sealing cap; 57 secondary sealing cap; 81 cylindrical portion; 83 inner diameter flange portion; 84 sealing elongated projection; 91 sealed space.

Claims

1 . A shielded connector comprising:
a shielded wire comprising a core wire which is made up of a covered electric wire, a braided wire tube which is made up of a metallic wire which covers the core wire and a sheath which is made up of an insulation resin which covers the braided wire tube;
a connection terminal having a center wire connecting portion which is electrically connected to a center wire of the core wire and a connector connecting portion which is electrically connected to a connection terminal of a mating connector;
a connector housing comprising a terminal accommodating portion for accommodating the connection terminal which is electrically connected to the core wire, an electric wire end portion accommodating cylindrical portion for accommodating a range of the shielded wire connected to the connection terminal which extends a predetermined length from the center wire connecting portion and a shielded crimping space which is provided in an intermediate position along the length of the electric wire end portion accommodating cylindrical portion and in which the braided wire tube is disposed which is exposed by stripping part of the sheath of the shielded wire; and
a substantially cylindrical plug member which is fittingly attached to an outer circumference of the sheath of the shielded wire at an opening end side of the electric wire end portion accommodating cylindrical portion so as to fill a gap between the sheath and the electric wire end portion accommodating cylindrical portion to thereby separate the shielded crimping space from the opening end side of the electric wire end portion accommodating cylindrical portion, the shielded connector comprising further:
a cylindrical sealing packing which is formed of an elastic material having waterproof property into a cylindrical shape and which is closely fitted on the sheath of the shielded wire so that the sealing packing is closely fitted in an inner circumference of the plug member at one end side and projects into an interior of the shielded crimping space at the other end side; and
a primary sealing cap which is formed of an elastic material having waterproof property into a substantially cylindrical portion and which is closely fitted on an outer circumference of the plug member at one end side and is closely fitted on an outer circumference of the other end portion of the sealing packing at the other end side thereof.
2. The shielded connector as set forth in Claim 1 , further comprising a secondary sealing cap which is fitted on an end portion of the plug member within the electric wire end portion accommodating cylindrical portion,
wherein the secondary sealing cap comprises a cylindrical portion which is closely fitted on the end portion of the plug member via the primary sealing cap and which covers an outer circumference of the shielded crimping space and a inner diameter flange portion which extends radially inwards from an end portion of the cylindrical portion so as to closely fit on an outer circumference of the core wire and defines the shielded crimping space into a closed space.
PCT/JP2010/067015 2009-09-24 2010-09-22 Shielded Connector WO2011037269A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-219569 2009-09-24
JP2009219569A JP2011070848A (en) 2009-09-24 2009-09-24 Shielded connector

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WO2011037269A1 true WO2011037269A1 (en) 2011-03-31

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WO (1) WO2011037269A1 (en)

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CN103855524A (en) * 2012-11-28 2014-06-11 住友电装株式会社 Device connector
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EP3509165A1 (en) * 2018-01-08 2019-07-10 Yazaki North America, Inc. Waterproof connector

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JP5990116B2 (en) * 2013-03-04 2016-09-07 矢崎総業株式会社 Connector waterproof structure
JP5667685B1 (en) * 2013-11-11 2015-02-12 日本航空電子工業株式会社 connector
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